chapman



(No Model.) 2 Sheets-Sheet l.

No. 279,130. Patented June 12.,` 1883.

N, PEYERS. Pbmo-Limqmpher, wnshingfm uc.

(No Model.) 2 Sheets-Sheet 2. F. H. CHAPMAN.

GQPFEB MILL. No. 279,130. Patented June 12,1883.

[L (HI 747 es. v Inv/671307.

EL. a4' j?? WM View of the crank-arm.

- UNITED STATES y PATENT OFFICE.

FRANK H. CHAPMAN, OF MERIDEN, CONNECTICUT, ASSIGNOR TO THE CHARLESPARKER COMPANY, OF SAME PLACE.

COFFEE-MILL.

SPECIFICATION forming part of Letters Patent No. 279,130, dated June 12,1883.

Application filed February 26, 1883. (No model.)

To all whom t may concern:

Be it known' that I, FRANK H. CHAPMAN, aV citizen of the United States,residing at Meriden, in the county of New I-Iaven and State ofConnecticut, have invented certain new and useful Improvements inCoffee-Mills; and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains t-o make and use the same,reference being had to the accompanying drawings, i

and to letters or iigures of reference marked thereon, which form a partot' this specification.

This invention relates to that class of coffeemills in which a conicalrunner is used within a conical ease or shell, the runner-spindle beingprovided with a nut for adjusting said run,- ner up or down, t0 grindmore finely or more coarsely as desired.

In the accompanying drawings, Figure 1 .represents a vertical section ofa coffee-mill embodying Ymy invention. Fig. 2 represents a plan view ofthe same with the cover open. Fig. 3 represents a detail view of therunner and its spindle. Fig. -i represents a detail Fig. represents adetail view ot' the adjusting-nut. Fig. 6 represents a detail view ofthecollar, hereinafter referred to, and Fig. fi represents an under viewet' the sectional cover.

In said drawings, A designates the box ot' a coffee-mill; I5, thedrawer; C, the metallic cast'- ing forming the top of said box; D, t-hehopper attached thereto by screws passing through its peripheral ilangeor rim d,- E, a 4bridge countersunk in the top of said hopper, andprovided at its middle with an upright tubu- .lar bearing, c,- F, aconical internally ridged or roughened shell, cast with said hopper, andcommunicating with it by means of an opening, j', in the bottom of. thelatter; and C, a conical ruimer of cast metal, which is ridged or roughened on its sides and turns withinsai d shell to do its grinding. withsaid runner, and extends up through bearing c, being provided with ashoulder, l1., which by contact withthe lower end of said bearingprevents said spindle from being drawn up too far through the saidbearing. On the top of said bearing rests a collar, I, and on top of Aspindle, H, is cast this collar rests the tubular inner end, J of acrank-arm, J, whereby the mill is operated.

The spindle H extends up through the said collar I and tubular part J ofarm J, the part H of said spindle passing through the latter beingflattened, as shown, (or of prismatic 'or irregular shap e,) in orderthat it may turn with the crank arm. The passage or opening j throughthe latter is of corresponding shape. The upper end, H2, of said spindleII is screwthreaded, to receive a nut, K,which holds the crank-arm,collar, spindle, and runner in place, and also adjusts the latter up ordown, so that it will grind more or less finely as desired.

The cover consists of two sections, L L, which are pivotedindependently, but at proximate points, and provided with toothedsegments Z Z', which mesh together, so that when one section, L or L, isopened the other opens also. They operate together similarly in closing.u" Y lt is very desirable to insure regularity of running by providingmeans i'or causing the crank-arm, nut, and collar to brace each other.To effect this I form an annular iange, m, on the under side of the nutK, and a similar ange, n, on the upper end otl collar I, and makecorresponding recesses o p, respectively, in the top and bottom ofthetubular part J ot' crank-arm J. The ange m lits into recess o, and theiiange n lits into recess j), and these iianges prevent the crank-armfrom swaying about, since they ail'ord it a more reliable bearing thanit otherwise would have, and they prevent any independent motion ot'said tubular part J over said collar or under said nut. As said nutclamps said tubular part J ofthe crank-armdown against said collar andthe latter down against the fixed bearing e, the interlocking parts ot'said nut and collar and said crank-arm brace each other veryeffectually, and turn together as one piece. Oi'eoursc the iianges maybe on the tubular part of t-he crank-arm, andthe recesses may be in thenut and collar. The latter may also be in one piece with the fixedbearing c, or with a fixed cover for thecoftee-mill box. Said collaracts `as a support 'for the tubular part J of the same out of IOO ,tical annular' flange n, with an external horizontal flange, n', onwhich rests the Ylower end of the tubular inner end, J, of erank-arm J.The cylindrical shape ofthe collar tends to make the pressure of thccollar on the bridge even and vertical.

On the top of the rim d of the `hopper l), at the front thereof, I formtwo slight protuberances, d cl2, and in the under side of the.coversections L L', I make notches or recesses Z2 l, which catch oversaid protuberances and hold the cover-sections in place, so that theyWill not be accidentally dislodged. A stop, l", lon the top of said rimfl' iits into recesses in the contiguous edges of said sections, andprevents them from jarring together;

I am aware it is not new to use a flaring collar 'Without' flanges forthe inner end of the crank-arm to rest von,.sa'id collar beingsupported` by an arch, and the other parts arranged substantially as Ihave descri bed. rThis, however, I do not claim.

I am also aware that covers have been ttastcned to the tops of boXes bynotches or recesses catching over protuberances 5 that the form of covershown herein is not new in coffeemills, and that such covers have beenfastened by openings in them catching` over fixed protuberances. I donot claim these constructions, broadly; but,

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

l. The cylindrical collar I, having at its upper end the verticalannular flange 'n and horizontal annular'flange n', in combination 4Withcrank-arm J, the tubular inner end of which is recessed to receiveflange oz., and rests upon flange n, the runner-spindle H, bridge E, andnut K, substantially as set forth.

2. A coffee-mill comprising a fixed stop, l?, fixed protuberances d d?,and cover-sectionsvL L', recessed to receivesaid stop when they-arcclosed together, and provided with notches or recesses -to catch overthose protuberances, substantially and for the purpose Vset forth.

In testimony whereof l affix my signature in presence of tivo witnesses.

FRANK H. CHAPMAN.

,lV-itnesses DEXTER W. PARKER, RALPH A. PALMER.

